APA (7th ed.) Citation

Ardley, P. B., & Ardley, E. C. (1935). The adventures of Mr. Horace Hedgehog. Collins.

Chicago Style (17th ed.) Citation

Ardley, Patricia B., and E. C. Ardley. The Adventures of Mr. Horace Hedgehog. London: Collins, 1935.

MLA (9th ed.) Citation

Ardley, Patricia B., and E. C. Ardley. The Adventures of Mr. Horace Hedgehog. Collins, 1935.

Warning: These citations may not always be 100% accurate.